<template>
  <div>
    <!-- 导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区域 -->
    <el-card>
      <!-- 警告区域 -->
      <el-alert
        title="注意：只允许为第三级分类设置相关参数"
        type="warning"
        :closable="false"
        show-icon
      ></el-alert>

      <!-- 选择商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>请选择商品分类：</span>
          <el-cascader
            :options="catelist"
            :props="cascaderProps"
            v-model="selectedKeys"
            clearable
            @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>

      <!-- tab页签区域 -->
      <el-tabs v-model="activeName" @tab-click="handleTabChange">
        <el-tab-pane label="动态参数" name="many">
          <el-button
            type="primary"
            size="mini"
            :disabled="iaBtnDisabled"
            @click="addDialogVisible = true"
            >添加参数
          </el-button>
          <!-- 动态参数表格 -->
          <el-table :data="manyTableData" border stripe>
            <!-- 展开列 -->
            <el-table-column type="expand">
              <template v-slot="scope">
                <el-tag
                  v-for="(item, i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handleClose(i, scope.row)"
                >
                  {{ item }}
                </el-tag>
                <!-- 输入文本框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                ></el-input>
                <!-- 添加按钮 -->
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag
                </el-button>
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column
              label="参数名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template v-slot="scope">
                <el-button type="primary" icon="el-icon-edit" size="mini"
                  >编辑</el-button
                >
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="removeParams(scope.row.attr_id)"
                  >删除
                </el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>

        <el-tab-pane label="静态属性" name="only">
          <el-button
            type="primary"
            size="mini"
            :disabled="iaBtnDisabled"
            @click="addDialogVisible = true"
            >添加属性
          </el-button>
          <!-- 静态属性表格 -->
          <el-table :data="onlyTableData" border stripe>
            <!-- 展开列 -->
            <el-table-column type="expand"></el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column
              label="属性名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template v-slot="scope">
                <el-button type="primary" icon="el-icon-edit" size="mini"
                  >编辑</el-button
                >
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="removeParams(scope.row.attr_id)"
                  >删除
                </el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>

    <!-- 添加参数对话框 -->
    <el-dialog
      :title="'添加' + titleText"
      :visible="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!-- 主体区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="80px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>

      <!-- 底部按钮 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取消</el-button>
        <el-button @click="addParams">确定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      catelist: [],
      cascaderProps: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
        expandTrigger: "hover",
      },
      selectedKeys: [],
      activeName: "many",
      manyTableData: [],
      onlyTableData: [],
      addDialogVisible: false,
      addForm: {
        attr_name: "",
      },
      addFormRules: {
        attr_name: [
          { required: true, message: "请输入参数名称", trigger: "blur" },
        ],
      },
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status != 200)
        return this.$message.error("获取商品分类失败");
      this.catelist = res.data;
      console.log(this.catelist);
    },
    handleChange() {
      this.getParamsData();
    },
    handleTabChange() {
      this.getParamsData();
    },
    async getParamsData() {
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        {
          params: { sel: this.activeName },
        }
      );
      if (res.meta.status != 200)
        return this.$message.error("获取参数列表失败");
      res.data.forEach((item) => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(" ") : [];
        item.inputVisible = false;
        item.inputValue = "";
      });

      if (this.activeName == "many") {
        this.manyTableData = res.data;
      } else {
        this.onlyTableData = res.data;
      }
    },
    addDialogClosed() {
      this.$refs.addFormRef.resetFields();
    },
    addParams() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return;
        const { data: res } = await this.$http.post(
          `categories/${this.cateId}/attributes`,
          {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeName,
          }
        );
        if (res.meta.status != 201) return this.$message.error("添加参数失败");
        this.getParamsData();
        this.addDialogVisible = false;
      });
    },
    removeParams(id) {
      this.$confirm("是否确认删除该参数？", "提示", {
        confirmButtonText: "确定",
        cancleButtonText: "取消",
        type: "warning",
      })
        .then((res) => {
          if (res == "confirm") {
            this.$http
              .delete(`categories/${this.cateId}/attributes/${id}`)
              .then((res) => {
                this.$message.success("删除参数成功！");
                this.getParamsData();
              })
              .catch((err) => {
                this.$message.error("删除参数失败");
              });
          }
        })
        .catch((err) => err);
    },
    handleInputConfirm() {},
    showInput(row) {
      row.inputVisible = true;
      this.$nextTick(() => {
        this.$refs.saveTagInput.$refs.input.focus();
      });
    },
    handleInputConfirm(row) {
      if (row.inputValue.trim().length == 0) {
        row.inputValue = "";
        row.inputVisible = false;
        return;
      }
      this.saveAttrVals(row);
    },
    async saveAttrVals(row) {
      const { data: res } = await this.$http.put(
        `categories/${this.cateId}/attributes/${row.attr_id}`,
        {
          attr_name: row.attr_name,
          attr_sel: row.attr_sel,
          att_vals: row.attr_vals.join(" "),
        }
      );
      if (res.meta.status != 200) return this.$message.error("修改参数项失败");

      row.attr_vals.push(row.inputValue.trim());
      row.inputValue = "";
      row.inputVisible = false;
      this.$message.success("修改参数项成功！");
    },
    handleClose(i, row) {
      row.attr_vals.splice(i, 1);
      this.saveAttrVals(row);
    },
  },
  computed: {
    iaBtnDisabled() {
      return this.selectedKeys.length == 0;
    },
    cateId() {
      if (this.selectedKeys.length == 3) return this.selectedKeys[2];
      return null;
    },
    titleText() {
      if (this.activeName == "many") {
        return "动态参数";
      } else {
        return "静态属性";
      }
    },
  },
};
</script>

<style lang="less" scoped>
.cat_opt {
  margin: 15px 0;
}

.el-tag {
  margin: 10px;
}

.input-new-tag {
  width: 120px;
}
</style>